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3(2v-6)+6v=-90
We move all terms to the left:
3(2v-6)+6v-(-90)=0
We add all the numbers together, and all the variables
6v+3(2v-6)+90=0
We multiply parentheses
6v+6v-18+90=0
We add all the numbers together, and all the variables
12v+72=0
We move all terms containing v to the left, all other terms to the right
12v=-72
v=-72/12
v=-6
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